KEP certainly wanted both parties (seller and buyer) to be there in person the two times I used them. As it wasn't a problem I never asked if this could be circumvented. It's probably possible. You could ask KEP directly or a lawyer?

They will need to see your passport, not a copy, and you will need to sign some forms yourself in the presence of the official dealing with it so, as far as I know, you need to be here. You could probably give power of attorney to a lawyer, I think. The purchase of my first car was dealt with by a lawyer but that was 20 years ago so I don't know if the rules have changed. Also I had to collect together a lot of official documents to send to him and I'm not sure how you could do that if you are not here. For example I had to get documents from the tax office and from a police station and I doubt if your daughter would be able to get them in your absence?